...
Example:
For a variable USER_EMAIL end the defined key of the variable as follows $(USER_EMAIL).
<propertyChange>
<formulaExpression>"The current email will be inserted here: $(USER_EMAIL)" </formulaExpression>
</propertyChange>
At run-time, the variable USER_EMAIL is replaced with the set value.
If the variables are DOM independent, they can be defined with the same method, JAXFrontProperties.getInstance().setUserProperty(String key, String value).